From: Ryuji Suzuki (RSuzuki@MIT.EDU)
Date: 02/21/03-12:36:46 PM Z
From: Monnoyer Philippe <monnoyer@imec.be>
Subject: RE: Glass plates
Date: Fri, 21 Feb 2003 10:34:55 +0100
> here:
Thanks
> |Don't you have any problem with dry strength? (scratch, etc.)
>
> No. But clean your glass VERY good.
> For scratch sensitivity, add a hardener.
I'm not worried about adhesion. I'm more worried about *dry* strength
when the gelatin is not gelated at a low temperature. According to
literature, as well as an expert at Eastman Gelatine (my gelatin
source), dry strength is strongly influenced by viscosity of the
dispersion and the gelation temperature, and mildly influenced by
Bloom strength. Also, if you don't gelate, the emulsion may not be as
clear as it could be with good gelation.
Hardener increases wet strength but does not significantly affect dry
strength. Also, a hardener is much more effective if the gelatin is
well gelated.
I guess dry plates produced without gelation process may be usable,
but I'm still thinking about getting a refrigerator for gelation
process.
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